Image display apparatus

Abstract

The invention is intended to change the viewing angle in accordance with a viewer's intention. Disposed between a light source ( 810 ) and a liquid crystal display panel ( 804 ), a Fresnel lens ( 812 ) converts light coming from the light source ( 810 ) to approximately parallel light and allows plural images to be displayed to different positions. The light source ( 810 ) is configured in such a manner that lighting positions and lighting regions can be changed. Lighting control means for changing the lighting positions or lighted regions of the light sources ( 810 ) is provided.

1. An image display apparatus in which a liquid crystal display panel having a display area is illuminated by a light source and a viewer sees an image displayed in the display area when illumination light passes through the liquid crystal display panel and reaches an eye or eyes of the viewer, characterized in that the light source is configured in such a manner that lighting positions or lighted regions can be changed,
 the image display apparatus further comprising;
 optical means for converging light emitted from the light source and passes through the liquid crystal display panel so that the light goes to a prescribed range; and 
 lighting control means for performing a control of changing the lighting positions or lighted regions of the light source, the image display apparatus further characterized in that:
 a range defined by a viewing angle, from which an image displayed in the display area is viewable, is changed by the lighting control means's changing a diffusion range of light emitted from the light source, 
 
 
 the image display apparatus further comprising;
 a viewing angle notification device for indicating a state of the viewing angle. 
 
 
   
   
     2. An image display apparatus in which a liquid crystal panel having a display area is illuminated by a light source and a viewer sees an image displayed in the display area when illumination light passes through the liquid crystal panel and reaches an eye or eyes of the viewer, characterized in that the light source is configured in such a manner that lighting positions or lighted regions can be changed,
 the image display apparatus further comprising:
 optical means for converging light emitted from the light source and passes through the liquid crystal panel so that the light goes to a prescribed range; and 
 lighting control means for performing a control of changing the lighting positions or lighted regions of the light source, the image display apparatus further characterized: 
 in that a range defined by a viewing angle, from which an image displayed in the display area is viewable, is changed by the lighting control means's changing a diffusion range of light emitted from the light source, 
 in that plural kinds of images that are different from each other in information content are displayed in the display area, and 
 in that the optical means converges light coming from the light source so that images that are different from each other in information content are presented to viewers located at different viewing positions, 
 
 the image display device further comprising: 
 a viewing angle notification device for indicating a state of the viewing angle. 
 
   
   
     3. An image display apparatus in which a liquid crystal panel having a display area is illuminated by a light source and a viewer sees an image displayed in the display area when illumination light passes through the liquid crystal panel and reaches an eye or eyes of the viewer, characterized in that the light source is configured in such a manner that lighting positions or lighted regions can be changed,
 the image display apparatus further comprising:
 optical means for converging light emitted from the light source and passes through the liquid crystal panel so that the light goes to a prescribed range; and 
 lighting control means for performing a control of changing the lighting positions or lighted regions of the light source, 
 
 the image display apparatus further characterized: 
 in that a range defined by a viewing angle, from which an image displayed in the display area, is viewable is changed by the lighting control means's changing a diffusion range of light emitted from the light source; and 
 in that the light source comprises:
 a light-emitting element for emitting light, and 
 
 polarizing means for transmitting toward the optical means, part of the light emitted from the light-emitting element, the part of the light emitted being light having a particular polarization direction and also being light whose polarization direction is perpendicular to the particular polarization direction; 
 the image display apparatus further characterized by further comprising: 
 filter means disposed between the liquid crystal display panel and the optical means and configured such that first regions for transmitting light having the particular polarization direction and second regions for transmitting light whose polarization direction is perpendicular to the particular polarization direction are arranged repeatedly in a prescribed direction; and 
 a viewing angle notification device for indicating a state of the viewing angle. 
 
   
   
     4. The image display apparatus according to  claim 1 , characterized in that the lighting control means comprises
 viewer position detecting means for detecting a viewing position of a viewer, and controlling a lighting state of the light source so that the viewing angle is changed in accordance with the detected viewing position. 
 
   
   
     5. The image display apparatus according to  claim 4 , further comprising:
 navigation means for detecting position information of a vehicle and for displaying the detected position information in the display area of the liquid crystal display panel together with map information, 
 
     the image display apparatus further characterized in that:
 the lighting control means comprises running state detecting means for detecting whether the vehicle is running or not, and controlling a lighting state of the light source so as to stop display of an image to a driver side if the vehicle is running and to permit display of an image to the driver side if the vehicle is parked. 
 
   
   
     6. The image display apparatus according to  claim 1 , characterized in that the lighting control means comprises
 viewer presence detecting means for detecting the presence/absence of a viewer, and controlling a lighting state of the light source so that the viewing angle is set larger when no viewer is detected than when a viewer is detected. 
 
   
   
     7. The image display apparatus according to  claim 6 , further comprising:
 navigation means for detecting position information of a vehicle and for displaying the detected position information in the display area of the liquid crystal panel together with map information, 
 
     the image display apparatus further characterized in that:
 the lighting control means comprises running state detecting means for detecting whether the vehicle is running or not, and controlling a lighting state of the light source so as to stop display of an image to a driver side if the vehicle is running and to permit display of an image to the driver side if the vehicle is parked. 
 
   
   
     8. The image display apparatus according to any one of  claims 1  to  3 , further comprising:
   navigation means for detecting position information of a vehicle and for displaying the detected position information in the display area of the liquid crystal display panel together with map information,   
 the image display apparatus further characterized in that:
 the lighting control means comprises running state detecting means for detecting whether the vehicle is running or not, and controlling a lighting state of the light source so as to stop display of an image to a driver side if the vehicle is running and to permit display of an image to the driver side if the vehicle is parked. 
 
 
   
   
     9. The image display apparatus according to any one of  claims 1  to  3 , further comprising:
 game control means for performing a variable display game by variably displaying plural pieces of identification information in the display area of the liquid crystal display panel and for giving a prize to a player in such a manner that the prize is correlated with a stop display form of the plural pieces of identification information; and 
 viewing angle selecting means for selecting a viewing angle in accordance with a manipulation input, 
 
     the image display apparatus further characterized in that the lighting control means controls a lighting state of the light source in accordance with the viewing angle selected by the viewing angle selecting means. 
   
   
     10. The image display apparatus according to any one of  claims 1  to  3 , further comprising:
 game control means for performing a variable display game by variably displaying plural pieces of identification information in the display area of the liquid crystal display panel and for giving a prize to a player in such a manner that the prize is correlated with a stop display form of the plural pieces of identification information; and 
 viewing angle selecting means for selecting a viewing angle in accordance with a manipulation input, 
 
     the image display apparatus further characterized in that the lighting control means comprises:
 viewer position detecting means for detecting a viewing position of a viewer, controlling a lighting state of the light source so that the viewing angle is changed in accordance with the detected viewing position, and controlling the lighting state of the light source in accordance with the viewing angle selected by the viewing angle selecting means. 
 
   
   
     11. The image display apparatus according to any one of  claims 1  to  3 , further comprising:
 game control means for performing a variable display game by variably displaying plural pieces of identification information in the display area of the liquid crystal display panel and for giving a prize to a player in such a manner that the prize is correlated with a stop display form of the plural pieces of identification information; and 
 viewing angle selecting means for selecting a viewing angle in accordance with a manipulation input, 
 the image display apparatus further characterized in that the lighting control means comprises 
 viewer presence detecting means for detecting presence/absence of a viewer, controlling a lighting state of the light source so that the viewing angle is set larger when no viewer is detected than when a viewer is detected, and controlling the lighting state of the light source in accordance with the viewing angle selected by the viewing angle selecting means.